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Finding the Fourth Proportional to 352,856.96, 529,288.17 and 86,619.78

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Solution

The fourth proportional to 352,856.96, 529,288.17 and 86,619.78 is: 129,930.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,856.96 : 529,288.17 = 86,619.78 : x
  2. Step 2: Convert to fraction form
    352,856.96/529,288.17 = 86,619.78/x
  3. Step 3: Cross multiply
    352,856.96x = 529,288.17 × 86,619.78
  4. Step 4: Simplify right side
    352,856.96x = 45,846,825,004.41
  5. Step 5: Solve for x
    x = 45,846,825,004.41/352,856.96
  6. Step 6: Final answer
    x = 129,930.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.